/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.lealone.db;

/**
 * Represents a command.
 *
 */
public interface Command extends AutoCloseable {

    int CLIENT_SQL_COMMAND = -1;
    int CLIENT_PREPARED_SQL_COMMAND = -2;

    int CLIENT_STORAGE_COMMAND = -11;
    int SERVER_STORAGE_COMMAND = -12;

    int REPLICATION_SQL_COMMAND = -21;
    int REPLICATION_STORAGE_COMMAND = -22;

    /**
     * Get command type.
     *
     * @return the command type.
     */
    int getType();

    /**
     * Cancel the command if it is still processing.
     */
    default void cancel() {
    }

    /**
     * Close the command.
     */
    @Override
    default void close() {
    }

    default int getId() {
        return 0;
    }

    default void setId(int id) {
    }
}
